Crossrow cultivator for tractors



P 1950 w. GRIFFITHS 2,521,631

CROSSROW CULTIVATOR FOR TRACTORS Filed May 22, 1946 5 Sheets-Sheet 1 mm L IA M Gem/=1 TH 5 INVENTOR.

Sept. 5, 1950 w. GRlFFlTHS 2,521,631

CROSSROW CULTIVATOR FOR TRACTORS Filed May 22, 1946 I 3 Sheets-Sheet 2 VV/LL/AM G/ /FF/ TH 5 IN V EN TOR.

i 13.1w. his-invention relates to n attachment rer cultivators for erossi'row plowing. The purpose of the invention is'lto smooth outthe hills on groundwhich' have'been produced by the first cultivation for row crops, such L as corn, beans, peas and others.

In ordinary cross 'row cultivation, the previously produced ground hills cause the tractor to jump when'passing each hill or row, which makes riding very rough. My cultivator device overcomes this jumping because of the fact that it. smooths out the ground hills in advance of the tractor, so that the tractor wheels can-pass over level ground, making driving smoother. My cultivatorattachment works independent of .the tractor steering wheels, thereby making steer.- ing and riding much easier and is rigidly attached preventing piug ingv r the front wheels of the tractor which now will runon level grounds- These and other objects and advantages of this invention will be better understood from the following description with the aid of the attached drawings, which form part of this application.

In the drawings, showing one embodiment of the invention:

Figure 1 is a view in side elevation of the cultivator attachment as fastened on the front end of a tractor;

Figure 2 is a fractional plan view in section taken on a plane along line 22 of Figure 1;

Figure 3 is a side elevational view of the shovel unit;

Figure 4 is a top plan view of the shovel unit in Figure 3;

Figure 5 is a sectional view taken alon line 55 of Figure 3;

Figure 6 is a view in front elevation of Figure l with narrow gauge front wheels and a single shovel or plowshare;

Figure '7 is a top plan view of Figure 1;

Figure 8 is a front view of a bar "attachment for a wide gauge tractor and two shovels; and

Figure 9 is a fragmentary view in section taken along line 9-9 of Figure 8.

Like numerals indicate" the same details in the different views of the drawings.

The front end of a tractor is indicated by numeral I5, supported in usual manner on narrow gauge front or steering wheels I6, the steering action being entirely independent of the operation of the cross row attachment.

The cross row cultivator device consists of a rigid bracket construction including a central horizontal bar ll, two side braces I8, l9 and an inclined middle brace 20 all secured as by bolts end thetractor I 5.;

" suspended. on; a cross bolt 28 passing through n, 18,19 and 2 0'areall joined and seamen;

gether at a forward point at 2 l, thereby. provid- 5 mg a. Stiff b a k t st a m on lhflfli sent;

Ontop of this fined bracket Sinatra. n;- s, I 9, 28 is welded a horizontal plate 22. and two vertical :plates 23, one at -eachend thereof, ,and

. beneaththatstructure is similarly welded, at.

the point 2|, a pair of spacedapart hinge plates; 24,25, The numeral 26 designates a rocking arm which has a right angularly turned end portion 21 which passeshorizontally through the plate 23. From the rear end of the rocking arm. 26 is an eye 26a, apair of shovel supporting plates, .29, 3.0 9 ,c lsachiside-o iw be t, y 25% Th e supporting plates extend downwardly for carrying the plowshare or shovel 3| with its clamping unit 55. For up and down adjustment of the supportin plates 29, 38 on the hinge bolt 28, a series of bolt holes 30a is provided, in a vertical line, in said plates.

In order to provide a substantially vertical rocking motion of plates 29, 30, a second rocking arm 32 is provided, carried between two hinge pins 33 and 34 in plates 24, 25 and 23, 30. respectively. A series of vertically arranged holes 33a for the rocking arm 32 is similarly provided in plates 24, 25.

In the spaced-apart upright plates 23 is mounted, to oscillate, a transverse crank shaft 35 with a forward lever 36 at one end, and rearward lever 31 at the other end. This crank shaft 35 is under control of an operatin rod 38, which is pivoted at 39 and extends rearwardly for convenient manipulation by the tractor driver or for mechanical power lift, Between the rear end of lever 31 and the nose portion 2| of the fixed bracket is inserted a compression spring 40 carried around a suspension rod We hung from the said lever 31 and pivoted at 48b to the rocking arm 32 for normally supporting the weight of the shovel 3| with its clamping unit.

The plowshare or shovel 3| with the usual flared wings is carried to oscillate on a pin 4| between two spaced bearing plates 42 which are welded to the lower end of a spring supporting block 43 having an upward bar extension 44 also welded thereto, so that parts 42, 43, M form a rigid structure. Between a rearward eye 45 on the block 43, around a rod 46 sliding therein and a collar 41 on said rod, is inserted a compression spring 48, the end of the rod 46 having hinge connection with a tailpiece 48 on the shovel 3|. By this means the shovel can be tripped against the spring action to yield, when meeting an obstruction on the ground. Normally, the shovel is held by the spring 48 as seen in Figure 3, against 5 an abutment 50 on the block 43. These elements 3|, 4! through 50, constitute the shovel unit 55.

The upright bar 44 on the plow block 43 is secured on a metal band 5! at the bottom end of the plates 29, 30 by a pair of clamping plates 10 Instead of a single shovel 3|, two may becar ried, as in Figure 8, on a cross bar 53 and secured on the band 5| by means-"o'f 'theclamping plates 52. This mode is preferably employed $9 1.1 5

broad gauge tractors. The two shovel'hnits are the same as for narrow gauge" tractors'with 'the' difference that both units are secured on the l cross bar 53 with adjustable spacing by set screws 54 abutting against the-*cross bar 53, which in 20 turn is carried on'the band 5| at the lowererid .0! the supporting plates Z9 SU-by'cIampin gplates It is to be understood that the inventionas;

hereindisclosed may be varie d from-thefdetails' spirit or the subjoined claim': I'claim: r

An earth working attachment for tractors described and shown without departure from the comprisin a pair of forwardly converging mem b bers having their rear ends secured to opposite sides of the front end'of the tractor, a bracket of U dorm extending laterally from the-forward ends of said members to apoint beyond the adjacent side of the tractor,-ashaft journalled-in the legs of said bracket} a crank at the outer end of said shaityan arm extending *at right angles to and from the other end offsa-id shaft," a second ;,;pivotally connected to said second arm intermedia te t her ends thereof, an open spiral spring encircling the upp'er'portion of said rod and adapted to. beocxnpressed on a downward movement of the first arm and the rod, a mounting on the lower ends of-said plates for an earth workin m eans; and means operatively connected with said crank and extending rearwardly therefrom alongside the tractor for manipulation by the operator of the tractor to atlfect'"thelraising and lowering of. said earth working means. f

" IQWI L MJG F I1S REFERENCES CITE D' vThe.fqllowing referencesvare oi record in t he file .-of this patenti r UNITED STATES PATENTS Humber' Name Date 1,041,975 Dennis Oct. 22,1912 1,068,868 Dugger July 29, 1913 2,099,637 Wendel Nov. 16, 1937 2 ,163,682 Heeren June 27,1939 2;!19fl93 j Lewis'on Nov. '14, 1939 2 3,490; it Ti an L 12,277,880 Noble Mar. 31,1942 

